The amount of money left in Alma’s bank account is expressed by the linear equation y = -27x + 577, where x represents the numbe
2 answers:
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Answer:
a = 1
Step-by-step explanation:
Given the point (a, 3) is on the line: 5x + y = 8.
Any point on the line satisfies the equation.
So, (a, 3) should satisfy the equation 5x + y = 8
Substituting x = a and y = 3, we get:
5(a) + 3 = 8
⇒ a = 1
Therefore, (1, 3) is the point on the line.
Multiply both the numerator and denominator by , which is called the "conjugate" of
:
Why do we pick this number? Recall the difference of squares factorization:
Now replace and
. Then
So in your fraction, you end up with
Finally, just expand the product.